Go easy on C1 noise reduction

I recently had to troubleshoot my camera to figure out why images from a recent shoot look smeared in places. It wasn't the camera! It was because I had moved the NR sliders to 70. It created this smeary look that looked like really weird flare.

Here's one of the shots:

http://www.muskopf.org/photos_08/flare.jpg

Here's one of my test shots with default NR:

http://www.muskopf.org/photos_08/test1.jpg

and the same image with C1 NR at 70

http://www.muskopf.org/photos_08/test4.jpg